Not much information here sadly, just an abstract that barely whets the appetite. That's ok, I suppose, but the cited paper's link, Optimal Transport Reconstruction of Baryon Acoustic Oscillations, requires a subscription to read the paper. Which is a sad reminder that science is pay-walled in so many places that one wonders if the glorious, explosive rate of physical science growth at the turn of the century would have even occurred had such paywalls existed then.